Senior Full Stack Engineer

Senior Full Stack Software Engineer (React / TypeScript / C# / .NET)

Location: Lisbon, Portugal | Hybrid (2 days onsite)

Salary: €55,000 – €65,000 + Benefits

The Opportunity

Pulse Group are working exclusively with a leading technology business operating at the heart of the London specialty insurance market, as they continue to invest in their Lisbon engineering team.

Our client operates a business-critical platform supporting approximately 80% of specialty insurance transactions placed in London and is now undertaking a major technology transformation.

They're rebuilding their core platform, moving away from legacy low-code technology towards a modern React, TypeScript, C#/.NET and Azure environment, alongside developing a new data platform to support future products and services.

We're looking for an experienced Senior Full Stack Software Engineer to help design, build and deliver modern, scalable applications as part of this transformation.

You don't need to be equally strong across frontend and backend development. We're open to engineers who lean more heavily towards either React/TypeScript or C#/.NET, provided you're comfortable working across the stack and keen to develop your expertise further.

This is an opportunity to contribute to a genuine platform rebuild rather than simply maintaining existing systems, with significant ownership and influence over technical decisions, architecture and engineering standards.

💻 Key Responsibilities

• Design, develop and maintain modern applications using React, TypeScript, C# and .NET .
• Build responsive, data-rich user interfaces with a focus on usability, accessibility and performance.
• Develop robust backend services, RESTful APIs and integrations using ASP.NET Core .
• Contribute to frontend and backend architecture, ensuring applications are scalable, maintainable and secure.
• Work with relational databases and complex business workflows.
• Develop and deploy cloud-based applications and services within Microsoft Azure .
• Collaborate with Product, Design and Engineering teams to deliver high-quality software.
• Champion modern engineering practices, including automated testing, code reviews, CI/CD and AI-assisted development.
• Take ownership of features and technical solutions from initial design through to production.

⚙️ Key Skills & Experience

We're looking for an experienced Software Engineer with a strong foundation in either frontend or backend development, alongside exposure to the wider full stack environment.

• Frontend: Commercial experience with React, TypeScript and modern JavaScript development.
• Backend: Experience with C#, .NET, ASP.NET Core and backend service development.
• API Development: Experience building or integrating RESTful APIs.
• Databases: Knowledge of SQL and relational databases, ideally SQL Server and Entity Framework Core.
• Cloud: Experience with Azure or other cloud platforms, alongside an understanding of CI/CD.
• Software Engineering: Good understanding of application architecture, scalability, performance and automated testing.
• Technical Ownership: Ability to take responsibility for features and contribute to architectural and engineering decisions.
• Collaboration: Comfortable working across engineering disciplines and contributing to the wider development of the platform.

Experience with Redux Toolkit, Zustand, component libraries, microservices, event-driven architectures or design systems would be advantageous.

We're equally interested in hearing from frontend-leaning engineers with backend experience and backend-leaning engineers with frontend experience. You don't need to tick every box, but should be confident in your core discipline and enthusiastic about working across the full stack.

🚀 Why Join?

This is an opportunity to join an ambitious engineering transformation, with genuine ownership and influence over how the platform evolves.

• Modern Technology: Work with React, TypeScript, C#/.NET, Azure and modern engineering practices.
• AI-First Engineering: Use tools such as Claude, GitHub Copilot and AI agents throughout the development lifecycle.
• Greenfield Development: Help replace legacy systems and build new applications, services and products.
• Technical Growth: Build on your existing frontend or backend strengths while developing broader full stack expertise.
• Real Ownership: Influence architecture, technical decisions and engineering standards.
• Business Impact: Build technology supporting one of the world's most important specialty insurance markets.
• Hybrid Working: Join a collaborative Lisbon engineering team with just two days per week onsite.

Interested?

If you're an experienced Software Engineer with a strong React/TypeScript or C#/.NET background , and you're excited by the opportunity to work across the stack while helping rebuild a business-critical platform, we'd love to hear from you.

Apply directly or get in touch for a confidential conversation.

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